MAGNETOELECTRIC INTERACTIONS IN BI-ANISOTROPIC MEDIA

Classification of bi-anisotropic media based on the structure of magne toelectric coupling dyadics is proposed. It appears that the most gene ral bi-anisotropic media can be modeled as composites of only a few ba sic idealized elements: for reciprocal materials, these elements are u niaxial helices and ''hats,'' and in the case of non-reciprocal media, the fundamental particles are Tellegen elements (coupled electric and magnetic dipoles). In particular, it is shown that some composites wi th omega-shaped conductive inclusions embedded in an isotropic dielect ric matrix can be considered as media with equivalent phantom chiral p articles. Also, the mechanism is analyzed of the bi-anisotropic materi al based on magnetostatic-wave resonators.